@ssd2020 Try adding a new "wired" network - enter a name and VLAN and then save it.
Then try to setup your wireless network. I think the configuration sequence has changed since they added support for switches.
Thankyou scott83, it worked . ( i wish it was in the manual)
You were right.
First we need to create a wired network >then create wireless network >Options>Under ,IP and network assignment , change the assigned network to the vlan created.